Toward Complete Pion Nucleon Amplitudes

Abstract

We compare the low-energy partial wave analyses $\pi N$ scattering with a high-energy data via finite energy sum rules. We construct a new set of amplitudes by matching the imaginary part from the low-energy analysis with the high-energy, Regge parametrization and reconstruct the real parts using dispersion relations.

Comments: Joint Physics Analysis Center ; 15 pages, 12 figures